Extracted from the 30 Mecha Design Flaws submission. Edited and reconfigured as a setting neutral piece for use in military aspected settings and most if not all flaws can be used on any vehicle or large piece of hardware.

The blast of charged particles tore into one of the entrenched tanks, then from the 'Mech's other barrel-arm into its mate emerging from behind a corner.
Commander Ratzelle had to admit - letting the rookie ride in the Warhammer was not such a bad choice after all; indeed was he a crack shot.
"Ha! There it goes, blown into pieces! We'll never see their sorry asses again!"
"I wouldn't be so sure about that, greenhorn" the lance leader replied. "Get ready for clean-up! We have to root them out by nightfall!"